کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
616062 1454861 2009 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
What results in fretting wear on polished femoral stems
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
What results in fretting wear on polished femoral stems
چکیده انگلیسی
Fretting wear on polished femoral stems has previously been observed in retrieval studies, and it is showing an increasing significance in the overall wear of cemented total hip replacement. However, the initiation and propagation process of this wear has not been fully understood, with shrinkage bumps and micropores in the cement surface being potential participants. In the present study, these two factors are investigated through a finite element analysis to determine which contributed more to fretting wear. A 2D finite element model was created to represent the stem-cement interface, and physiological loading was applied on the femoral stem to simulate the situation during patient walking. The analysis indicated that the functionality of the shrinkage bumps was incidental in comparison with the micropores as the relative micromotion between the femoral stem and the shrinkage bumps was significantly lower than that between the femoral stem and the micropores. Additionally, the influence of micropore size and loading level on generation of fretting wear was further investigated, and an effective method was proposed to retard fretting wear and to improve the survivorship of cemented total hip replacement. This study theoretically validated the potential contribution of the micropores to generation of fretting wear.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tribology International - Volume 42, Issues 11–12, December 2009, Pages 1605-1614
نویسندگان
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